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'SKEMA OTI12012
PHYSICS FORM 5 Paper 3
NO
1(a) (i)
(ii)
(iii)
(b) (0
(ii)
(iii)
SECTION A
MARKING CRITERIA
State the manipulated variable correctlyAngle of incidence / i
State the responding variable correctlyAngle of refraction / r II sin r
State the constant variable correctlyRefractive index
Record the readings of r correctlyDiagram 1.2Diagram 1.3Diagram 1.4Diagram l.SDiagram 1.6Note
11°
20°
29°
36°41°
1. All 5 values correct - 2 marks2. 3 or 4 values correct - 1 mark
State the values of sin i correctly
Diagram 1.2 : 0.2588Diagram 1.3 : 0.5000Diagram 1.4 : 0.7071Diagram 1.5 : 0.8660Diagram 1.6 : 0.9659Note : 1. Accepte.c.f. from (b)(i)
2. All 5 values correct - 2 marks3. 3 or 4 values correct - 1 mark4. Notnecessary to have consistent number of d.p.
State the values of sin r correctlyAll 5 values of sin r correct
Diagram 1.2 : 0.1908Diagram 1.3 : 0.3420Diagram 1.4 : 0.4848Diagram 1.5 : 0.5878Diagram 1.6 : 0.6561Note : 1. Accept e.cf. from (b)(i)
2. All 5 values correct - 2 marks3. 3 or 4 values correct - 1 mark4. Not necessary to have consistent number of d.p.
MARK
SUB TOTAL
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